Migrate Python guidelines from Poetry to uv

Python/TEMPLATE.md

@@ -14,7 +14,7 @@ template/
 ├── <tool_name>.py          # Entry point — named by purpose or tool name
 ├── <tool_name>.spec        # PyInstaller spec (only for projects shipping an .exe)
 ├── prebuild.py             # Pre-build script: venv check, version print, console= rewrite
-├── pyproject.toml          # Poetry config (ruff, mypy, pytest)
+├── pyproject.toml          # Project config (ruff, mypy, pytest)
 ├── docs/
 │   └── .gitkeep            # Detailed documentation lives here, never in the root
 ├── src/
@@ -36,7 +36,7 @@ copies themselves **are committed** with the project and are never edited in pla
 - **DEBUG mode** via `ENV_DEBUG=true` in `.env` (adds "DEV" suffix to version: v1.2.3DEV)
 - **Build configuration** via `ENV_BUILD_CONSOLE` and `ENV_BUILD_SPEC` in `.env`, applied by `prebuild.py`
 - **loguru** for logging (never print for debugging)
-- **Poetry** for dependency management, `poetry.lock` committed
+- **uv** for dependency management and Python versions, `uv.lock` committed
 - **pytest** for testing (no unittest)
 - **ruff + mypy** for linting and type checking (120-character lines)